Relining rubber dental plates



.(Model.')

131". HYATT. RELINING RUBBERDBNT-AL PLATES;

No. 29s,7s9. Patented Feb 1 1884.

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ATTORNEYS WITNESSES:

fizz 4 i N. PETKR$ Phummha n UNITED STATES FRANK r. YATT, 0F NORWALK,CONNECTICUT.

PATENT OFFICE.

RELINING RUBBER DENTAL PLATES.

SPECIFICATION forming part of Letters Patent No. 293,739, dated February19, 1884.

Application filed October 2.1883.' (ModeL) 'Be it known that I, FRANKT.HYATT, of Norwalk, in the county of Fairfield and State of Connecticut,have invented a new and Improved Process for Relining' Dental Plates, ofwhich the following is a full, clear, and exact description.

It frequently occurs that rubber dental plates do not fit the roof ofthe mouth after the said plates have been used a number of years, onaccount of changes that have taken place in the shape of the roof of themouth,

and in such cases a new set of teeth must be made.

The object of my invention is to reline the. plates or provide the oldgums and teeth with a new roof-plate made to fit against the roof of themouth.

In carrying out my improved process, I cut out the old plate, so thatonly the gums holding the teeth remain, and then I form a thin lining ofrubber on the top of the gums, and by means of this lining I unite thegums and form a new roof-plate. I

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar letters of reference indicatecorresponding parts in both figures.

' Figure 1 is a plan view of the under side of one set of teeth providedwith my improvement. 'Fig. 2 is an enlarged detail cross-sectionalelevation of part of the same on the line 00 m, Fig. 1.

The artificial teeth A -are held in gums B, i which are embedded in-ahard-rubber gumframe, 0, which is made integral with the.

original roof-plate, which original roof-plate I cut out, as shown bythe U-shaped line in Fig. 1. Thena series of notches, a, are formed inthe remaining portion of the gum-frame O, on the in and out sides. Theupper surface of the gum-frame O is provided with a plastic lining, D,of rubber, which must be as thin as possible, of which rubber a ridge,D, is also builtup on the outer edge of the gum-frame, and a roof-plate,D", is formed,whioh-is shaped to fit closely against the roof of themouth, and is provided on its upper surface with the usualsuction-recess,E. Tenons I) are formed out of the soft rubber within thenotches a, which tenons serve to hold the ridge D and roof D on thegum-frame O. The lining D unites the ridge D and the roof D andstrengthens the dental plate, and at the same time permits of formingthe top of the gum-frame in such a manner that it fits well against thenatural gums.

By relining dental plates in the manner described, old plates of teeth,to which the wearer has become accustomed,.can at any time be.

adjusted or changed to fit well in the mouth. I am aware that it "is notnew to make the roof of alloy gum or to connect it with the teeth by ametallic base; but

What I do claim as new and of my invention The processof relining dentalplates, con- FRANK T. HYATT.

Witnesses:

LE GRAND O. BETTS, LUTHER S. ,Potr'rE

